HD6413007F20 Datasheet, PDF (281/798 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

8. I/O Ports
Table 8.3 Input Pull-Up Transistor States (Port 4)
Mode
Reset
Hardware
Standby Mode
Software
Standby Mode
Other Modes
8-bit bus mode
Off
Off
On/off
On/off
16-bit bus mode
Off
Off
Legend:
Off: The input pull-up transistor is always off.
On/off: The input pull-up transistor is on if P4PCR = 1 and P4DDR = 0. Otherwise, it is off.
8.3 Port 6
8.3.1 Overview
Port 6 is an 4-bit input/output port that is also used for input and output of bus control signals
(BACK, BREQ, WAIT) and for clock (φ) output.
The port 6 pin configuration is shown in figure 8.2.
The pin in port 6 functions are P6₇ (generic input)/φ, P6₂/BACK, P6₁/BREQ, and P6₀/WAIT. See
table 8.5 for the selection of the pin functions.
See Section 19, Power-Down State, for clock output pin. See Section 6, Bus Controller, for bus
control I/O pin (BACK, BREQ and WAIT).
Pins in port 6 can drive one TTL load and a 90-pF capacitive load. They can also drive a
darlington transistor pair.
Rev.5.00 Sep. 12, 2007 Page 251 of 764
REJ09B0396-0500